.top{
  position:absolute;
  z-index:1;
  /*background-image:url(file:///images.macx.cn/forum/201410/23/091432yk20q1qbko04xy94.jpg);*/
  background-size:100% 100%;
  height:20%;
  width:100%;
  top: 0px;
  left: 0px;
  box-shadow: 0px 0px 18px 0px;
}

.fillContent{
  position:absolute;
  z-index:2;
  width:100%;
  height:100%;
  max-width:100%;
  max-height:100%;
  background-image:url(file:///C:/Users/Administrator/git/scuthnwebHtml/scuthnwebpages/image/homepage/u2.jpg);
  background-size:100% 100%;
}

body{
  width:100%;
  height:100%;
  background-color:#FFFFFF; 
}

.blackC{
  position:absolute;
  z-index:3;
  background-color:#000000;
  opacity:.5;
  width:100%;
  height:100%;
}

#content{
  visibility:hidden;
}

